Reading every journal at once. What no human has done.
For every date with two or more expedition narrators writing, this database produces a side-by-side analysis comparing what each preserved. Long-form thematic essays trace patterns across years. Every claim cites a specific journal entry. Every analysis is reviewed before publication.
The Silence of Meriwether Lewis: What Clark and the Sergeants Preserved, August 1805–January 1806
For roughly 135 days spanning the Bitterroot crossing, the descent of the Columbia, and the founding of Fort Clatsop, Meriwether Lewis put down his pen. The expedition's most consequential geographic transit survives only through the eyes of Clark, Ordway, Gass, and Whitehouse — a documentary absence that shapes everything we…
Read the analysisFeatured analyses
A curated mix — thematic essays, per-figure deep dives, and rich multi-narrator dates.
Diet Across the Expedition: A Seasonal Analysis
From the bison-rich winter at Fort Mandan to the salmon and wapato of the Pacific coast, the Corps of Discovery's diet shifted dramatically with season, geography, and Indigenous…
Sacagawea: The Shoshone Interpreter of the Corps of Discovery
From her recruitment at Fort Mandan in November 1804 to her family's farewell at the Mandan villages in August 1806, Sacagawea — the young Shoshone wife of Toussaint…
Cameahwait: The Shoshone Chief Who Saved the Expedition
Brother to Sacagawea and chief of the Lemhi Shoshone, Cameahwait provided the horses and guidance without which the Corps of Discovery could not have crossed the Rocky Mountains.
Corn for Iron, and a Daughter Reclaimed: Two Registers at Fort Mandan
On a cold, windy March day at Fort Mandan, Ordway records the steady barter of corn and dried buffalo for blacksmith work, while Clark notes a diplomatic visit…
Three Pens at Canoe Camp: Sickness, Salmon, and a Curious Wool
On a single September day at Canoe Camp, Ordway logs routine labor, Clark tallies the sick and the venison, and Gass alone steps back to ethnographize — describing…
Six Languages and a Gugling Tongue: Encountering the Flathead Salish at Ross’s Hole
On a frosted September morning in the Bitterroot valley, Lewis and Clark's party met the Eoote-lash-Schute. Three narrators — Clark, Ordway, and Whitehouse — record the council, the…
Trade at the Pickets: Four Pens on a Mandan Market Day
On a warm December day at Fort Mandan, four expedition journalists record the same scene of Indigenous traders bringing corn, beans, and moccasins to the half-built fort —…
Three Pens, Two Rivers: A Disjointed Day on the Pacific Slope
On December 23, 1805, the expedition's journals fracture across geography and genre. Clark dobs a hut in pouring rain at Fort Clatsop while Gass describes portaging canoes around…
Thematic essays
Long-form analyses that cut across many dates — diet, illness, language, weather, copying patterns, naming conventions.
Diet Across the Expedition: A Seasonal Analysis
From the bison-rich winter at Fort Mandan to the salmon and wapato of the Pacific coast, the Corps of Discovery's diet shifted…
Diet Across the Expedition: A Seasonal Analysis
From buffalo feasts on the northern plains to dog meat purchased on the Columbia and elk steaks rationed at Fort Clatsop, the…
Per-narrator studies
One essay for each expedition diarist — their distinctive voice, omissions, recurring themes, and how their writing evolved.
Key figure profiles
AI-assisted biographical syntheses drawn from every entry that mentions each person or nation.
George Shannon: The Youngest Soldier of the Corps of Discovery
From a starving boy lost on the prairie to a trusted hunter and trader on the return journey, George Shannon's three-year apprenticeship…
The Shawnee Nation in the Lewis & Clark Record
Though the Corps of Discovery did not encounter the Shawnee homeland during their westward journey, the Shawnee people occupied a notable place…
Sergeant Nathaniel Pryor: A Steady Hand of the Corps of Discovery
From squad leader at Camp Dubois to trusted lieutenant of small parties, Sergeant Nathaniel Pryor emerges from the journals as one of…
The Yakama Nation in the Lewis & Clark Journals: A Brief Encounter at the Great Confluence
The Yakama people appear in the expedition record at a single pivotal moment — the Corps of Discovery's October 1805 arrival at…
The Iowa Tribe in the Lewis & Clark Journals: A Note on Absence
Although the Iowa (Ioway) Nation appears peripherally in the broader ethnographic horizon of the Lewis and Clark Expedition, the corpus of journal…
The Hidatsa: Knife River Villagers and the Expedition’s Northern Crossroads
The Hidatsa — known to the French as the Gros Ventres or Big Bellies, and to themselves and the captains by various…
The Osage Nation in the Lewis & Clark Journals: A Synthesis
Though no journal entries in our tagged corpus directly reference the Osage Nation, their shadow falls across the early expedition record through…
Auguste Chouteau: St. Louis Patron of the Corps of Discovery
Co-founder of St. Louis and dean of its fur trade, Auguste Chouteau appears in the journals as host, supplier, and commercial presence…
The Crow (Apsáalooke) in the Lewis & Clark Journals: A Distant but Decisive Presence
Though Lewis and Clark never held a council with the Apsáalooke, the Crow nation shadowed the expedition's path across the northern plains…
The Sac and Fox Nation in the Lewis & Clark Record
Although the Sac (Sauk) and Fox (Meskwaki) nations occupied lands along the Mississippi and lower Missouri at the time of the Corps…
George Catlin in the Lewis & Clark Journal Record
George Catlin, the famed painter of Native American life, does not appear in the Lewis and Clark journals — but his later…
The Omaha (Maha) Nation: A Diminished People in the Journals of Lewis & Clark
Encountered as a once-powerful nation reduced by smallpox, the Omaha appear in the journals as absent hosts, grieving survivors, and distant adversaries…
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853 date-bound analyses, in chronological order.
How these analyses are written
AI-Assisted Each analysis is drafted by Anthropic Claude using only the primary-source journal entries cited within it, then reviewed by a human editor before publication. AI surfaces patterns that single-narrator scholarship cannot — copying lineages, prose-register shifts, side-by-side accounts of the same day from opposite sides of the camp. Every claim must trace to a specific journal entry. We're transparent about the method because we believe it's defensible scholarship, not a substitute for it.